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The difference between high strength bolts and normal bolts

Different names, natural performance is different, usually high-strength bolts can bear the same load than ordinary bolts larger.
Common bolt material is Q235 (ie A3) manufactured.
High-strength bolt material 45 # steel, alloy steel (such as 20MnTiB, 35VB) or other high-quality materials, made after the heat treatment, increased strength.
The difference between the two is the difference in material strength.
The first point: from raw materials to analyze:
High-strength bolts made of high-strength materials. High-strength bolts, nuts and washers are made of high strength steel, commonly used 45 steel, 40 boron steel, 20 manganese titanium boron steel. Common Q235 steel bolts commonly used in manufacturing.
The second point: From the intensity level point of view:
Commonly used 8.8 and 10.9 two intensity levels, of which 10.9 majority. Normal bolt strength level is low, usually 4.4, 4.8, 5.6. (8.8S and 10.9S for steel structure only)

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